Revert "Install httpgd 2.0.2 from archive"

This reverts commit 5e3ca3b7.

base/latest.Dockerfile

@@ -146,13 +146,8 @@ RUN apt-get update \
     echo "$(which radian) \"\${@}\"" >> $(which radian)_; \
   fi \
   ## Install httpgd
-  ## Archived on 2025-02-14 as requires archived package 'unigd'.
-  && install2.r --error --skipinstalled -n $NCPUS \
-    unigd \
-    AsioHeaders \
-  && curl -sLO https://cran.r-project.org/src/contrib/Archive/httpgd/httpgd_2.0.2.tar.gz \
-  && R CMD INSTALL httpgd_2.0.2.tar.gz \
-  && rm httpgd_2.0.2.tar.gz \
+  && install2.r --error --deps TRUE --skipinstalled -n $NCPUS \
+    httpgd \
   ## Get rid of libcairo2-dev and its dependencies (incl. python3)
   && apt-get -y purge libcairo2-dev \
   && apt-get -y autoremove \